Hectograph band



July 30, 1935. A. H. MEYER 2,009,896

HEGTOGRAPH BAND Original Filed Sept. 28, 1931 III! I I ZHHHIHIIIIIIHIIIII l I I l l l I l I I l I l l l l I I I Patented July30, 1935 UNITED STATES 'HECTOGRAPH BAND Alva VH1. Meyer, ()ak Park,Ill;, assignor to Ditto Incorporated, a corpo ration of West VirginiaOriginal application September 28, 1931, Serial Divided and thisapplication March 31, 1934, Serial No. 718,500

3 Claims.

This invention relates to hectograph bands of the type employed inhectograph machines.

A particular object of the invention is to provide a hectograph bandwhich is extremely long so that when it is used in a hectograph machine,it will not be necessary to replace it frequently with a fresh band.

Heretofore, relatively short hectograph bands have been employed inhectograph machines and in those instances where the machine was insubstantially constant use, it was necessary to remove the hectographband from the machine after its surface had been used once. The usedband was then placed in storage until the anilin ink on its surface haddisappeared into the gelatin. As these rolls are relatively heavy andare moist and somewhat tacky, the hands and clothes of the operator wereoften smudged with the copying ink.

By providing a multiple hectograph band comprising a plurality ofindividual bands detachably secured to each other, many objections tothe use of hectograph machines are overcome.

It will be readily understood that if an individual band becomes damagedor otherwise unfit for use, it may be replaced. This is advantageous asthe individual bands may be made relatively short, if so desired, andtherefore, if an individual band becomes unfit for use there will berelatively little loss when it is removed from the multiple band.

Other objects and advantages will become apparent as the followingdetailed description progresses, reference being had to the accompaningdrawing, in which Fig. 1 is an elevational view showing a spindleconstructed in accordance with the present invention, having securedthereto a length of flexible material;

Fig. 2 is a sectional view taken substantially through the center of thespindle shown in Fig. 1;

Fig. 3 is a plan view showing improved means for detachably securing theends of flexible material; and

Fig. 4 is a plan view showing a length of material with a modified formof opening.

This application is a division of my co-pending application, Serial No.565,508 filed September 1 28, 1931.

The spindle shown in Figures 1 and 2 is formed of a tubular or bodyportion l0 having hubs l2 formed on the respective ends providing flatprojecting studs l4 adapted for insertion in journalling means. Spindlesof the above type are (Cl. ll-31.5)

used in hectograph machines and have wound upon them lengths of flexiblematerial which form the duplicating surface for the machines. It isdesirable that the ends of the material may be easily and convenientlysecured to the spindle 5 as it is often necessary to remove a wornduplicating band and replace aclean band.

In accordance with the present invention the body portion H! of thespindle is provided with a plurality of spaced slits so as to formsections 10 I6 which may be depressedout of the plane defined by thecircumference of the body portion. Certain of these sections retaintheir arcuate concave formation, alternate sections Hi, however, beingdepressed into a substantially concave shape, This construction providesa passageway extending longitudinally of the body portion havingsuificient width and length to receive a removable key l8 formed of aflat strip of celluloid or other suitable material. Preferably the keyis formed of a material so that the same has greater rigidity than theflexible material adapted to be secured to the spindle. Also, it isdesirble to form the key of a flat strip since this form providesrigidity and strength in one direction while being quite flexible in theother direction, facilitating insertion in the passageway.

The means provided by which the flexible hectograph bands can bedetachably secured together or to a spindle constructed as described isbest understood by reference to Figure 3, which shows a length ofmaterial 20 having .one of its ends overlapping the end of a length ofmaterial 1 22. Slits 24 are located in spaced relation transversely ofthe end and are so positioned that the slits coincide with those formedin the end of the associated length of material. By depressing alternatesections formed by the spaced slits out of their normal plane apassageway can be formed for receiving the removable key 26. Asdescribed this type of key is also of flat formation and may beconstructed of celluloid or other suitable material. The relation of thekey with respect to the ends of the flexible material is such that theends are securely fastened together and since the flattened side of thekey is parallel with the surface of the material a rigid andstrengthened joint results. In much the same manner the duplicating band30, having formed in its end the spaced slits 32, can be detachablysecured to the spindle by means of the removable key l8.

In Figure 4 a modified form of opening is shown comprising the squareopenings 34. The

material adapted to be secured to 36 is of course also provided withsquare openings positioned with respect to the margins of the materialand so spaced as to coincide with openings 34 when the ends areoverlapped. In the same manner as described a removable key can bethreaded through the openings to detachably secure the respectivelengths of material togetherr It is to be understood that I do not wishto be 10 limited by the exact embodiment of the device shown, which ismerely by wayof illustration and.

not limitation, as various and other forms of the device wil1 of coursebe apparent to those skilled in the art without departing from thespirit of 15 the invention or the scope of the claims.

I claim:

1. A multiple hectograph band comprising a plurality of individualentirely flexible hectograph bands, said individual bands being providedwith means for detachably connecting them to each other.

2. A multiple hectograph band comprising a plurality of individualentirely flexible hectograph bands, and means for detachably connectingthe bands to each other.

3.A multiple hectograph band comprisinga plurality of individualentirely flexible hectograph bands, and entirely flexible means fordetachably connecting the bands to each other.

'- r ALVA H. MEYER.

